Question

An atom with 4 protons, 5 neutrons, and 4 electrons has an atomic mass of _____ amu. (Enter a whole number.)

Answer 1

4+5=9 amu

Step-by-step explanation:

Together, the number of protons and the number of neutrons determine an element's mass number: mass number = protons + neutrons.

Hope this helps! :)))))

Answer 2

atomic mass = number of protons + number of neutrons = 4+5 = 9 amu